LagoonWatch is MRC’s signature citizen scientist water quality monitoring program for the Indian River Lagoon. 2026 marks 35 years that we have trained and equipped hundreds of volunteer monitors to collect weekly data on a dozen water quality parameters (including pH, salinity, and clarity levels) of the Lagoon’s waters. Monitoring locations cover the entire expanse of the Lagoon from Ponce Inlet in the north to Jupiter Inlet in the south.

LagoonWatch volunteers now use state-compliant gear! This includes digital water quality probes that measure temperature, salinity, pH, conductivity, and total dissolved solids. In 2025 we added nitrogen and phosphate data collection with the help of an IRLNEP Small Grant! In 2026, we are adding dissolved oxygen probes -- the first 10 will be purchased with a second IRLNEP Small Grant. We also monitor a handful of sites for enterobacteria.

These improvements don’t just make sampling easier; they also unlock new potential for how the data can be used. Internally, MRC now shares monthly data snapshots via our newsletter and social media. Starting in 2026, we will integrate these high-quality citizen science datasets into our annual IRL Health Report. Even more exciting, the updated methods will allow us to upload data to the Watershed Information Network (WIN). This database is a key resource that state and local agencies use to guide policy, assess water quality, and support environmental decision-making.

At MRC, we believe that data should drive action, and we’re committed to making sure the efforts of our volunteers contribute to restoration, awareness, and stewardship throughout the region. Keeping LagoonWatch running costs MRC approximately $50,000 each year — covering equipment, testing chemicals, staff support, and program overhead. With the exception of a few small grants, this program is sustained by donations to MRC.